11-04-2014, 03:42 PM
(11-04-2014, 03:32 PM)Marsupial Wrote: Hello Dustin,
I have a 47-1230 - the big brother of your radio. Similar, more bands.
Do you always have a hum, or just in some of the bands? e.g. do you have it in AM and shortwave, plus phono?
On mine, the phono did not work, but its transformer was causing a bad hum. I ended up disconnecting it to restaure the AM and FM radios. I still can't pick up shortwaves, but that might not be a technical problem (no suitable antenna might mean no signal)
you seem to have done a nice job on the recap.
Thanks. Yes it does hum regardless of the phono/SW/AM setting.
Ive checked voltages against a voltage chart that is posted within the schematics. Everything looks to be close to posted voltages, except one of my 7H7s has a cathode voltage reading of 2.4V - according to the chart its supposed to be .7 volts. is this too far off? And if it is what does that mean?
